diff --git a/clang/include/clang/Analysis/FlowSensitive/DebugSupport.h b/clang/include/clang/Analysis/FlowSensitive/DebugSupport.h
--- a/clang/include/clang/Analysis/FlowSensitive/DebugSupport.h
+++ b/clang/include/clang/Analysis/FlowSensitive/DebugSupport.h
@@ -24,6 +24,9 @@
 namespace clang {
 namespace dataflow {
 
+/// Returns a string representation of a value kind.
+std::string debugString(Value::Kind Kind);
+
 /// Returns a string representation of a boolean assignment to true or false.
 std::string debugString(Solver::Result::Assignment Assignment);
 
diff --git a/clang/lib/Analysis/FlowSensitive/DebugSupport.cpp b/clang/lib/Analysis/FlowSensitive/DebugSupport.cpp
--- a/clang/lib/Analysis/FlowSensitive/DebugSupport.cpp
+++ b/clang/lib/Analysis/FlowSensitive/DebugSupport.cpp
@@ -31,6 +31,32 @@
 using llvm::fmt_pad;
 using llvm::formatv;
 
+std::string debugString(Value::Kind Kind) {
+  switch (Kind) {
+  case Value::Kind::Integer:
+    return "Integer";
+  case Value::Kind::Reference:
+    return "Reference";
+  case Value::Kind::Pointer:
+    return "Pointer";
+  case Value::Kind::Struct:
+    return "Struct";
+  case Value::Kind::AtomicBool:
+    return "AtomicBool";
+  case Value::Kind::Conjunction:
+    return "Conjunction";
+  case Value::Kind::Disjunction:
+    return "Disjunction";
+  case Value::Kind::Negation:
+    return "Negation";
+  case Value::Kind::Implication:
+    return "Implication";
+  case Value::Kind::Biconditional:
+    return "Biconditional";
+  }
+  llvm_unreachable("Unhandled value kind");
+}
+
 std::string debugString(Solver::Result::Assignment Assignment) {
   switch (Assignment) {
   case Solver::Result::Assignment::AssignedFalse: